Steps To Duplicate
1) User A goes to Administration > Global Changes > Creates a global change process. This can seemingly be any global change process; for example, the Add Constituent Attribute global change process.
2) Notice that User A is now the owner of this global change.
3) User B goes to Administration > Global Changes > Clicks the hyperlink on the global change name to go to the Global Change Process Page for this global change.
4) Before running the process, start a SQL Profiler Trace.
5) User B runs the process.
6) Immediately after the global change process completes in CRM, stop the SQL Profiler Trace > Review the trace file > Search for User A's APPUSER.ID > Notice that that the only place it appears is in the @CURRENTAPPUSERID variable referenced in the USP_GLOBALCHANGE stored procedure.